EP3172015B1 - Systeme und verfahren zur roboterselbstkorrektur - Google Patents

Systeme und verfahren zur roboterselbstkorrektur Download PDF

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Publication number
EP3172015B1
EP3172015B1 EP15825127.2A EP15825127A EP3172015B1 EP 3172015 B1 EP3172015 B1 EP 3172015B1 EP 15825127 A EP15825127 A EP 15825127A EP 3172015 B1 EP3172015 B1 EP 3172015B1
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EP
European Patent Office
Prior art keywords
robotic device
legged
action
legged robotic
leg
Prior art date
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Active
Application number
EP15825127.2A
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English (en)
French (fr)
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EP3172015A1 (de
EP3172015A4 (de
Inventor
Alexander Douglas PERKINS
Matthew MALCHANO
Shervin Talebinejad
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Boston Dynamics Inc
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Boston Dynamics Inc
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Application filed by Boston Dynamics Inc filed Critical Boston Dynamics Inc
Priority to EP21155566.9A priority Critical patent/EP3835004A1/de
Publication of EP3172015A1 publication Critical patent/EP3172015A1/de
Publication of EP3172015A4 publication Critical patent/EP3172015A4/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J9/00—Programme-controlled manipulators
    • B25J9/16—Programme controls
    • B25J9/1679—Programme controls characterised by the tasks executed
    • B25J9/1682—Dual arm manipulator; Coordination of several manipulators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J9/00—Programme-controlled manipulators
    • B25J9/16—Programme controls
    • B25J9/1674—Programme controls characterised by safety, monitoring, diagnostic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J19/00—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators
    • B25J19/0008—Balancing devices
    • B25J19/002—Balancing devices using counterweights
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J5/00—Manipulators mounted on wheels or on carriages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J9/00—Programme-controlled manipulators
    • B25J9/16—Programme controls
    • B25J9/1615—Programme controls characterised by special kind of manipulator, e.g. planar, scara, gantry, cantilever, space, closed chain, passive/active joints and tendon driven manipulators
    • B25J9/162—Mobile manipulator, movable base with manipulator arm mounted on it
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D57/00—Vehicles characterised by having other propulsion or other ground- engaging means than wheels or endless track, alone or in addition to wheels or endless track
    • B62D57/02—Vehicles characterised by having other propulsion or other ground- engaging means than wheels or endless track, alone or in addition to wheels or endless track with ground-engaging propulsion means, e.g. walking members
    • B62D57/032—Vehicles characterised by having other propulsion or other ground- engaging means than wheels or endless track, alone or in addition to wheels or endless track with ground-engaging propulsion means, e.g. walking members with alternately or sequentially lifted supporting base and legs; with alternately or sequentially lifted feet or skid
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S901/00—Robots
    • Y10S901/01—Mobile robot

Definitions

  • Robotic devices may be used for many applications, and may operate in a variety of environments. Unfortunately, during operation, a robotic device may fall or tip over, preventing the robotic device from moving normally. Controlling the robotic device to successfully right itself can be a difficult and time-consuming task for operators. For instance, those controlling the robotic device generally need to determine how to re-orient the robotic device to a desired position, if it is even possible.
  • US2002/0116091A1 describes a system that detects that the posture of the apparatus main body has been shifted from the normal posture into an abnormal posture on the basis of the acceleration information obtained as detection output of the acceleration sensor. Then, it restores the normal posture by means of a playback technique for controlling various drivers, using route planning data stored in advance in the memory.
  • the present application discloses embodiments that relate to self-right procedures for legged robotic devices.
  • the present application describes a method operable by a computing device.
  • the method may include determining an orientation of a bottom surface of a legged robotic device with respect to a ground surface.
  • the legged robotic device may further include two or more legs extending from a body of the legged robotic device.
  • the method may also include determining that the legged robotic device is in an unstable position based on the determined orientation, wherein the legged robotic device is unable to maintain a stance in the unstable position.
  • the method may also include performing a first action configured to return the legged robotic device to a stable position such that the legged robotic device is able to maintain a stance in the stable position, wherein the first action includes moving a first leg of the legged robotic device from a first position to a second position, such that a distal end of the first leg is further away from the ground surface in the second position than in the first position.
  • a proximal end of the first leg may be coupled to a first side of the legged robotic device.
  • the method may also include extending at least two of the two or more legs of the legged robotic device, if the first action causes the legged robotic device to return to the stable position.
  • the method may also include performing a second action configured to return the legged robotic device to the stable position, if the legged robotic device is in the unstable position after the first action.
  • the second may include extending the distal end of the first leg of the legged robotic device away from the body of the legged robotic device such that a gravitational potential energy of the legged robotic device is increased.
  • the present application discloses a robotic device.
  • the robotic device may include a body, two or more legs extending form the body, at least one processor, and data storage comprising program logic executable by the at least one processor to cause the robotic device to perform functions.
  • the functions may include determining an orientation of a bottom surface of a robotic device with respect to a ground surface.
  • the functions may also include determining that the robotic device is in an unstable position, based on the determined orientation, wherein the robotic device is unable to maintain a stance in the unstable position.
  • the functions may also include performing a first action configured to return the robotic device to a stable position such that the robotic device is able to maintain a stance in the stable position, wherein the first action includes moving a first leg of the robotic device from a first position to a second position, such that a distal end of the first leg is further away from the ground surface in the second position than in the first position. A proximal end of the first leg may be coupled to a first side of the robotic device.
  • the functions may also include extending at least two of the two or more legs of the robotic device, if the first action causes the robotic device to return to the stable position.
  • the functions may also include performing a second action configured to return the robotic device to the stable position, if the robotic device is in the unstable position after the first action.
  • the second may include extending the distal end of the first leg of the robotic device away from the body of the robotic device such that a gravitational potential energy of the robotic device is increased.
  • the present application discloses a non-transitory computer-readable storage medium having stored thereon instructions, that when executed by a computing device, cause the computing device to carry out functions.
  • the functions may include determining an orientation of a bottom surface of a legged robotic device with respect to a ground surface.
  • the legged robotic device may further include two or more legs extending from a body of the legged robotic device.
  • the functions may also include determining that the legged robotic device is in an unstable position based on the determined orientation, wherein the legged robotic device is unable to maintain a stance in the unstable position.
  • the functions may also include performing a first action configured to return the legged robotic device to a stable position such that the legged robotic device is able to maintain a stance in the stable position, wherein the first action includes moving a first leg of the legged robotic device from a first position to a second position, such that a distal end of the first leg is further away from the ground surface in the second position than in the first position.
  • a proximal end of the first leg may be coupled to a first side of the legged robotic device.
  • the functions may also include extending at least two of the two or more legs of the legged robotic device, if the first action causes the legged robotic device to return to the stable position.
  • the functions may also include performing a second action configured to return the legged robotic device to the stable position, if the legged robotic device is in the unstable position after the first action.
  • the second may include extending the distal end of the first leg of the legged robotic device away from the body of the legged robotic device such that a gravitational potential energy of the legged robotic device is increased.
  • a legged robotic device may need to be capable of autonomously picking itself up from a wide variety of starting positions.
  • a robotic device may encounter an obstacle, trip, and subsequently fall to its side.
  • the robotic device may be configured with a self-right procedure designed to place the robotic device in an upright, stable position prior to standing.
  • the self-right procedure may initially involve determining that the robot is in an unstable position, such as on its side for example. In one example, such a determination may be made by one or more sensors on the robotic device.
  • the robotic device may determine the position of its center of mass and compare the determined position with the position of the feet of the robotic device.
  • the robotic device may determine it is in an undesirable position and cannot stand up. If the center of mass of the robotic device is within the polygon defined by its feet, the robotic device may determine it is in an upright and stable position and may proceed to stand up.
  • the robotic device may then initiate one or more actions designed to return the robotic device to a stable position. After each action, the robotic device may make a determination whether or not the robotic device is still in an unstable position. If the robotic device determines that it is no longer in an unstable position, the robotic device may extend its legs to stand up and return to a fully functional mode of operation. If the robotic device determines that it is still in an unstable position, the robotic device may move on to a new action designed to return the robotic device to a stable position. The robotic device may continue to perform self-right actions until a determination is made that it is no longer in an unstable position.
  • Figure 1 illustrates a functional block diagram illustrating a robotic device 100, according to an example embodiment.
  • the robotic device 100 may include various subsystems such as a mechanical system 120, a sensing system 130, a control system 140, as well as a power supply 150.
  • the robotic device 100 may include more or fewer subsystems and each subsystem could include multiple elements. Further, each of the subsystems and elements of robotic device 100 could be interconnected. Thus, one or more of the described functions of the robotic device 100 may be divided up into additional functional or physical components, or combined into fewer functional or physical components. In some further examples, additional functional and/or physical components may be added to the examples illustrated by Figure 1 .
  • the mechanical system 120 may include several components, including a body 102, one or more robotic legs 104, and one or more robotic feet 106 coupled to the one or more robotic legs 104.
  • the mechanical system 120 may additionally include a motor 108, which may be an electric motor powered by electrical power, or may be powered by a number of different energy sources, such as a gas-based fuel or solar power. Additionally, motor 108 may be configured to receive power from power supply 150.
  • the power supply 150 may provide power to various components of robotic device 100 and could represent, for example, a rechargeable lithium-ion or lead-acid battery. In an example embodiment, one or more banks of such batteries could be configured to provide electrical power. Other power supply materials and types are also possible.
  • the sensing system 130 may determine information about the environment that can be used by control system 140 (e.g., a computing device running motion planning software) to determine whether the robotic device 100 is in an upright and stable position or in an unstable position.
  • the control system 140 could be located on the robotic device 100 or could be in remote communication with the robotic device 100.
  • the sensing system 130 may use one or more body-mounted sensors 110 attached to the body 102 of the robotic device 100, which may be 2D sensors and/or 3D depth sensors that sense information about the environment as the robotic device 100 moves.
  • the body-mounted sensors 110 may determine a distance between the body 102 of the robotic device 100 and the ground surface on which the robotic device 100 operates.
  • one or more robotic leg sensors 112 may be located on the robotic legs 104 of the robotic device 100.
  • the robotic leg sensors 112 may be contact sensors configured to alert the robotic device when the robotic legs 104 are in contact with the ground surface.
  • the robotic legs 104 may be coupled to robotic feet 106 that contact the ground surface.
  • the robotic device 100 may include one or more robotic feet sensors 114 positioned on the robotic feet 106 of the robotic device 100.
  • the robotic feet sensors 114 may be contact sensors configured to alert the robotic device 100 when the robotic feet 106 are in contact with the ground surface.
  • the information from the robotic legs sensors 112 and/or the robotic feet sensors 114 may be used to determine whether the robotic device 100 is in a stable position or an unstable position, as discussed in more detail below.
  • the sensing system 130 may further include an inertial measurement unit (IMU) 116.
  • IMU 116 may include both an accelerometer and a gyroscope, which may be used together to determine the orientation, position, and/or velocity of the robotic device 100.
  • the accelerometer can measure the orientation of the robotic device 100 with respect to gravity, while the gyroscope measures the rate of rotation around an axis.
  • IMUs are commercially available in low-cost, low-power packages.
  • an IMU 116 may take the form of or include a miniaturized MicroElectroMechanical System (MEMS) or a NanoElectroMechanical System (NEMS). Other types of IMUs may also be utilized.
  • MEMS MicroElectroMechanical System
  • NEMS NanoElectroMechanical System
  • the IMU 116 may include other sensors, in addition to accelerometers and gyroscopes, which may help to better determine position and/or help to increase autonomy of the robotic device 100.
  • sensors Two examples of such sensors are magnetometers and pressure sensors. Other examples are also possible.
  • Control system 140 may include at least one processor 118 (which could include at least one microprocessor) that executes instructions 122 stored in a non-transitory computer readable medium, such as the memory 124.
  • the control system 140 may also represent a plurality of computing devices that may serve to control individual components or subsystems of the robotic device 100 in a distributed fashion.
  • memory 124 may contain instructions 122 (e.g., program logic) executable by the processor 118 to execute various functions of robotic device 100, including those described below in relation to Figure 2 .
  • Memory 124 may contain additional instructions as well, including instructions to transmit data to, receive data from, interact with, and/or control one or more of the mechanical system 120, the sensor system 130, and/or the control system 140.
  • Figure 2 is a flow chart of an example method for self-righting a robotic device, in accordance with at least some embodiments described herein.
  • Method 200 shown in Figure 2 presents an embodiment of a method that, for example, could be used with the systems shown in Figure 1 , for example, or may be performed by a combination of any components of in Figure 1 .
  • Method 200 may include one or more operations, functions, or actions as illustrated by one or more of blocks 202-212. Although the blocks are illustrated in a sequential order, these blocks may in some instances be performed in parallel, and/or in a different order than those described herein. Also, the various blocks may be combined into fewer blocks, divided into additional blocks, and/or removed based upon the desired implementation.
  • each block may represent a module, a segment, or a portion of program code, which includes one or more instructions executable by a processor for implementing specific logical functions or steps in the process.
  • the program code may be stored on any type of computer readable medium, for example, such as a storage device including a disk or hard drive.
  • the computer readable medium may include a non-transitory computer readable medium, for example, such as computer-readable media that stores data for short periods of time like register memory, processor cache and Random Access Memory (RAM).
  • the computer readable medium may also include non-transitory media, such as secondary or persistent long term storage, like read only memory (ROM), optical or magnetic disks, compact-disc read only memory (CD-ROM), for example.
  • the computer readable media may also be any other volatile or non-volatile storage systems.
  • the computer readable medium may be considered a computer readable storage medium, a tangible storage device, or other article of manufacture, for example.
  • each block in Figure 2 may represent circuitry that is wired to perform the specific logical functions in the process.
  • Functions of the method 200 may be fully performed by a computing device, or may be distributed across multiple computing devices and/or a server.
  • the computing device may be incorporated into a robotic device, or the computing device may be an independent component in wireless communication with the robotic device.
  • the computing device may receive information from sensors or other components coupled to the computing device, or where the computing device is a server the information can be received from another device that collects the information.
  • the computing device could further communicate with a server to determine information that may facilitate the performance of the method 200.
  • the method 200 includes determining an orientation of a bottom surface of a robotic device with respect to a ground surface.
  • the robotic device may include two or more legs extending from its body, which may be used to maneuver the robotic device.
  • the robotic device may include a sensing system including an IMU.
  • the IMU may include an accelerometer and a gyroscope, as examples.
  • the IMU may be configured to output data for determining the orientation of the robotic device.
  • One or more processors of the robotic device may receive the data from the IMU, and make a determination of the current orientation of the robotic device.
  • the IMU may detect the current rate of acceleration using one or more accelerometers, and may further detect changes in rotational attributes like pitch, roll, and yaw using one or more gyroscopes.
  • the robotic device may include one or more body-mounted sensors attached to the body of the robotic device.
  • Such body-mounted sensors may be 2D sensors and/or 3D depth sensors that sense the ground surface and determine an orientation of the bottom surface of the robotic device.
  • the bottom surface of the robotic device may include one or more contact sensors, such that when the robotic device is in the unstable position, there is not contact between the ground surface and the contact sensors on the bottom surface of the robotic device.
  • the bottom surface of the robotic device may be shaped such that the gravitational potential energy of the robotic device is reduced based on the robotic device being in a stable position with respect to the ground surface.
  • the bottom surface may be shaped in a semi-circular fashion, such as an egg or domed tortoise shell.
  • the robotic device may have a low center of mass positioned near the bottom surface. The robotic device may accomplish this by positioning its hardware components near its bottom surface. In such a configuration, when the robotic device is on its side the robotic device naturally tends to roll to a stable position. Other arrangements are possible as well.
  • the method 200 includes determining that the robotic device is in an unstable position. Such a determination may be made by one or more processors of the robotic device, using the determined orientation of the bottom surface as an input
  • the unstable position may include the robotic device positioned on its side in a lying position such that the robotic device is unable to maintain a stance in the unstable position. In the unstable position, the robotic device is unable to maintain a stance, meaning the robotic device is unable to extend its legs to cause the robotic device to stand.
  • the robotic device may determine that it is in an unstable position by determining a position of its center of mass, and subsequently determining a position of the feet of the robotic device. The robotic device may project the position of the center of mass vertically onto the ground surface.
  • the robotic device may include sensors positioned on the feet to determine a given position of each of the feet. The robotic device may then compare the determined position of the feet with the determined position of the center of mass. If the center of mass is outside of a polygon defined by the position of the feet, the robotic device may determine that it is in an unstable position and cannot stand up. If the center of mass is within the polygon defined by the position of the feet, the robotic device is in an upright and stable position and may proceed to stand up.
  • the bottom surface of the robotic device may include one or more contact sensors.
  • the robotic device may determine that the robotic device is in an unstable position if there is no contact between the ground surface and the contact sensors on the bottom surface of the robotic device.
  • Other examples are possible as well.
  • the method 200 includes performing a first action configured to return the robotic device to a stable position.
  • the robotic device may be in an unstable position lying on a first side of the robotic device.
  • the first action may include moving a first leg of the robotic device from a first position to a second position.
  • the first leg may include a distal end that is positioned near the ground surface, and a proximal end that is couple to the first side of the robotic device.
  • the distal end of the first leg may be coupled to a foot. The distal end of the first leg is further away from the ground surface in the second position than the first position.
  • the first leg may be cleared out of the way such that the gravitational potential energy and shape of the robotic device may return the robot to a stable position.
  • the robotic device may include four or more legs.
  • the first action may include moving each of the legs positioned on the first side of the robotic device from the first position to the second position.
  • the method 200 includes determining whether or not the first action returns the robotic device to a stable position.
  • the robotic device In the stable position, the robotic device is able to maintain a stance, meaning the robotic device is able to extend its legs to cause the robotic device to stand.
  • the robotic device may use one or more body-mounted sensors, one or more contact sensors, and/or the IMU system to make this determination.
  • the robotic device may receive an indication from the one or more processors of the robotic device of a current position of the bottom surface.
  • method 200 continues at block 210 with extending at least two legs of the robotic device.
  • the robotic device may proceed to any number of postures, including but not limited to sitting, standing, or crawling.
  • the robotic device may extend both of its legs to cause the robotic device to stand.
  • the robotic device may extend all four of its legs to cause the robotic device to stand.
  • the quadruped robotic device may only extend two of its four legs. In such an example, the robotic device may extend one leg on a first side of the robotic device and another leg on a second side of the robotic device. Other examples are possible as well.
  • method 200 continues at block 212 with performing a second action configured to return the robotic device to a stable position.
  • the second action may include extending the distal end of the first leg away from the body of the robotic device. The distal end of the first leg may contact the ground surface and push the robotic device further away from the stable position, thereby increasing the gravitational potential energy of the robotic device. The increased gravitational potential energy and shape of the robotic device may return the robot to a stable position.
  • the robotic device may include four or more legs.
  • the second action may include extending each of the legs positioned on the first side of the robotic device away from the body of the robotic device to increase the gravitational potential energy of the robotic device. Additional actions configured to return the robotic device to a stable position are possible as well, as discussed in more detail below.
  • a self-right system for a legged robotic device is described.
  • a robotic device may utilize a combination of self-right actions to cause the robotic device to move from an unstable position to a stable position.
  • Figures 3A-3G illustrate the robotic device performing various self-right functions, according to an example embodiments.
  • Figure 3A illustrates an example embodiment when the robotic device 300 is in a standing position in a fully functional mode.
  • the robotic device 300 is shown as a quadruped, although other configurations are possible as well.
  • the robotic device 300 may include a body 302, and four legs 304A-304D extending from the body 302.
  • the legs 304A-304D are shown contacting a ground surface 306.
  • the center of mass is shown near the bottom surface of the robotic device 300.
  • the bottom surface of the robotic device is U-shaped, such that when the robotic device 300 is on its side the body 302 naturally tends to roll to a stable position.
  • Figure 3B illustrates an example embodiment when the robotic device 300 is in an unstable position.
  • the robotic device 300 may use one or more body-mounted sensors, one or more contact sensors, and/or an IMU system to determine if it is in an unstable position.
  • the robotic device 300 is on its left side, with legs 304C and 304D on the ground side, and legs 304A and 304B on the sky side.
  • the robotic device 300 is unable to maintain a stance in the unstable position shown in Figure 3B .
  • Figure 3C illustrates an example action configured to return the robotic device 300 to a stable position.
  • the robotic device 300 may move its ground side legs 304C, 304D from a first position (e.g.., the position shown in Figure 3B ) to a second position (e.g., the position shown in Figure 3C ).
  • the distal ends of the ground side legs 304C, 304D are further away from the ground surface in the second position than in the first position.
  • the gravitational potential energy and shape of the robotic device 300 may return the robot to a stable position.
  • Figure 3D illustrates an example embodiment when the robotic device 300 is in a stable position.
  • the robotic device 300 In the stable position, the robotic device 300 is stable and can extend its legs 304A-304D to stand and return to a fully functional mode of operation.
  • the robotic device 300 may proceed to any number of postures from the stable position, including but not limited to sitting, standing, or crawling.
  • the bottom surface of the robotic device 300 may include one or more contact sensors.
  • the robotic device 300 may determine that the robotic device 300 is in a stable position if there is contact between the ground surface 306 and the contact sensors on the bottom surface of the robotic device 300.
  • Figure 3E illustrates another example action configured to return the robotic device 300 to a stable position.
  • the robotic device 300 may move its ground side legs 304C, 304D away from the body 302 of the robotic device 300.
  • the distal ends of the ground side legs 304C, 304D may contact the ground surface 306 and push the robotic device 300 further away from the stable position, thereby increasing the gravitational potential energy of the robotic device 300.
  • the increased gravitational potential energy and shape of the bottom surface of the robotic device 300 may return the robotic device 300 to a stable position.
  • the robotic device 300 may extend its ground side legs 304C, 304D to push the robotic device further away from the stable position, and then subsequently move its ground side legs 304C, 304D to the position shown in Figure 3C .
  • Other examples are possible as well.
  • the robotic device 300 may perform a third action configured to return the robotic device 300 to a stable position.
  • Figure 3F illustrates yet another example action configured to return the robotic device 300 to a stable position.
  • the robotic device 300 may extend its sky side legs 304A, 304B to lower the center of mass of the robotic device 300. Further, the robotic device 300 may move its sky side legs 304A, 304B away from the ground surface 306 and/or towards the ground surface 306 so as to provide an angular momentum to the robotic device 300.
  • the robotic device 300 may alternate between moving its sky side legs 304A, 304B away from the ground surface 306, and towards the ground surface 306 to rock the robotic device 300 in an attempt to return the robotic device 300 to the stable position.
  • Figure 3G illustrates yet another example action configured to return the robotic device 300 to a stable position.
  • the robotic device 300 may extend its ground side legs 304C, 304D away from the body 302 to push off of a potential obstruction (e.g., a rock, a wall, etc.) that may be preventing the robotic device 300 from returning to the stable position.
  • a potential obstruction e.g., a rock, a wall, etc.
  • the robotic device 300 may extend its sky side legs 304A, 304B to achieve the same goal.
  • the robotic device may perform one or more of the actions described above in relation to Figures 3A-3G to attempt to return the robotic device 300 to a stable position. After each action, the robotic device 300 may make a determination whether or not the performed action returned the robotic device 300 to the stable position. If the robotic device 300 determines it is in the stable position, the robotic device 300 may stand and continue to operate in a fully functional mode. If the robotic device 300 determines it is still in an unstable position, it may continue to perform the described actions until the robotic device 300 determines it is no longer in an unstable position.
  • Figure 4 illustrates another example robotic device 400 configured to perform functions of the example method, in accordance with at least some embodiments described herein.
  • Figure 4 illustrates an example robotic device 400 having a body 402, and four legs 404A-404D extending from the body 402.
  • the body 402 is shown with a low center of mass, and a bottom surface with a profile 406 such that the gravitational potential energy of the robotic device 400 is reduced based on the robotic device 400 being in a stable position.
  • the robotic device 400 may be configured to perform the various self-right actions described above in relation to Figures 3A-3G .
  • Figure 5 illustrates a computer-readable medium configured according to an example embodiment.
  • the example system can include one or more processors, one or more forms of memory, one or more input devices/interfaces, one or more output devices/interfaces, and machine-readable instructions that when executed by the one or more processors cause the system to carry out the various functions, tasks, capabilities, etc., described above.
  • FIG. 5 is a schematic illustrating a conceptual partial view of an example computer program product that includes a computer program for executing a computer process on a computing device, arranged according to at least some embodiments presented herein.
  • the example computer program product 500 is provided using a signal bearing medium 502.
  • the signal bearing medium 502 may include one or more programming instructions 504 that, when executed by one or more processors may provide functionality or portions of the functionality described above with respect to Figures 1-4 .
  • the signal bearing medium 502 can be a computer-readable medium 506, such as, but not limited to, a hard disk drive, a Compact Disc (CD), a Digital Video Disk (DVD), a digital tape, memory, etc.
  • the signal bearing medium 502 can be a computer recordable medium 508, such as, but not limited to, memory, read/write (R/W) CDs, R/W DVDs, etc.
  • the signal bearing medium 502 can be a communications medium 510, such as, but not limited to, a digital and/or an analog communication medium (e.g., a fiber optic cable, a waveguide, a wired communications link, a wireless communication link, etc.).
  • a communications medium 510 such as, but not limited to, a digital and/or an analog communication medium (e.g., a fiber optic cable, a waveguide, a wired communications link, a wireless communication link, etc.).
  • the signal bearing medium 502 can be conveyed by a wireless form of the communications medium 510.
  • the one or more programming instructions 504 can be, for example, computer executable and/or logic implemented instructions.
  • a computing device such as the processor 118 of Figure 1 is configured to provide various operations, functions, or actions in response to the programming instructions 504 conveyed to the processor 118 by one or more of the computer-readable medium 506, the computer recordable medium 508, and/or the communications medium 510.
  • the non-transitory computer-readable medium could also be distributed among multiple data storage elements, which could be remotely located from each other.
  • the device that executes some or all of the stored instructions could be a client-side computing device.
  • the device that executes some or all of the stored instructions could be a server-side computing device.

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Claims (15)

  1. Verfahren, das von einem Computergerät betrieben werden kann, wobei das Verfahren die folgenden Operationen umfasst:
    Ermitteln (202) einer Ausrichtung einer Bodenfläche unter einer mit Beinen versehenen Robotervorrichtung (300) in Bezug auf eine Bodenfläche (306), wobei die mit Beinen versehene Robotervorrichtung zwei oder mehr Beine (304A-D) beinhaltet, die sich von einem Körper (302) der mit Beinen versehenen Robotervorrichtung erstrecken;
    basierend auf der ermittelten Ausrichtung das Ermitteln (204), dass sich die mit Beinen versehene Robotervorrichtung in einer instabilen Position befindet, wobei die mit Beinen versehene Robotervorrichtung nicht in der Lage ist, einen Stand in der instabilen Position beizubehalten;
    Bereitstellen von Anweisungen, durch das Computergerät, um eine erste Aktion durchzuführen, die so konfiguriert ist, dass die mit Beinen versehene Robotervorrichtung in eine stabile Position zurückgebracht wird, sodass die mit Beinen versehene Robotervorrichtung in der Lage ist, einen Stand in der stabilen Position beizubehalten, wobei die erste Aktion das Bewegen eines ersten Beins (304C, 304D) der mit Beinen versehenen Robotervorrichtung von einer ersten Position zu einer zweiten Position, derart beinhaltet, dass ein distales Ende des ersten Beins in der zweiten Position weiter von der Bodenfläche entfernt ist als in der ersten Position, und wobei ein proximales Ende des ersten Beins mit einer ersten Seite der mit Beinen versehenen Robotervorrichtung gekoppelt ist;
    wenn sich die mit Beinen versehene Robotervorrichtung nach der ersten Aktion in der stabilen Position befindet, Bereitstellen von Anweisungen, durch das Computergerät, um zumindest zwei der mit zwei oder mehreren Beinen versehenen Robotervorrichtung auszufahren; und
    wenn sich die mit Beinen versehene Robotervorrichtung nach der ersten Aktion in der instabilen Position befindet, Bereitstellen von Anweisungen, durch das Computergerät, um eine zweite Aktion durchzuführen, die so konfiguriert ist, dass die mit Beinen versehene Robotervorrichtung in die stabile Position zurückgebracht wird, wobei die zweite Aktion das Ausfahren des distalen Endes des ersten Beins der mit Beinen versehenen Robotervorrichtung vom Körper der mit Beinen versehenen Robotervorrichtung weg beinhaltet, sodass eine potenzielle Schwerkraftenergie der mit Beinen versehenen Robotervorrichtung erhöht wird.
  2. Verfahren nach Anspruch 1, wobei die mit Beinen versehene Robotervorrichtung eine Trägheitsmesseinheit, IMU, (116), einschließlich eines Beschleunigungsmessers und eines Gyroskops, beinhaltet, und wobei die mit Beinen versehene Robotervorrichtung ferner einen Prozessor beinhaltet, der konfiguriert ist, die Ausrichtung der Bodenfläche der mit Beinen versehenen Robotervorrichtung in Bezug auf die Bodenfläche basierend auf Messungen von der IMU zu ermitteln.
  3. Verfahren nach Anspruch 1, ferner folgende Operationen umfassend:
    wenn sich die mit Beinen versehene Robotervorrichtung nach der zweiten Aktion in der stabilen Position befindet, Bereitstellen, durch das Computergerät, von Anweisungen, um zumindest zwei der mit zwei oder mehreren Beinen versehenen Robotervorrichtung auszufahren; und
    wenn sich die mit Beinen versehene Robotervorrichtung nach der zweiten Aktion in der instabilen Position befindet, Bereitstellen, durch die Rechenvorrichtung, von Anweisungen zum Durchführen einer dritten Aktion, die konfiguriert ist, die mit Beinen versehene Robotervorrichtung in die stabile Position zurückzuführen.
  4. Verfahren nach Anspruch 3, wobei die dritte Aktion das Ausfahren eines distalen Endes eines zweiten Beins der mit Beinen versehenen Robotervorrichtung vom Körper der Robotervorrichtung weg umfasst, und wobei ein proximales Ende des zweiten Beins mit einer zweiten Seite der mit Beinen versehenen Robotervorrichtung gekoppelt ist, und optional, wobei die dritte Aktion ferner das Ausfahren des distalen Endes des ersten Beins der mit Beinen versehenen Robotervorrichtung weg von dem Körper der mit Beinen versehenen Robotervorrichtung im Wesentlichen gleichzeitig mit dem Ausfahren des distalen Endes des zweiten Beins umfasst.
  5. Verfahren nach Anspruch 3, wobei die dritte Aktion das Bewegen des zweiten Beins von der Bodenfläche weg umfasst, um einen Drehimpuls für die mit Beinen versehene Robotervorrichtung bereitzustellen.
  6. Verfahren nach Anspruch 3, ferner folgende Operationen umfassend:
    wenn sich die mit Beinen versehene Robotervorrichtung nach der dritten Aktion in der stabilen Position befindet, Bereitstellen, durch das Computergerät, von Anweisungen, um zumindest zwei der mit zwei oder mehreren Beinen versehenen Robotervorrichtung auszufahren; und
    wenn sich die mit Beinen versehene Robotervorrichtung nach der dritten Aktion in der instabilen Position befindet, Bereitstellen, durch das Computergerät, von Anweisungen, die erste Aktion auszuführen, die konfiguriert ist, um die mit Beinen versehene Robotervorrichtung in die stabile Position zurückzubringen.
  7. Verfahren nach Anspruch 1, wobei der Vorgang des Ermittelns, ob sich die mit Beinen versehene Robotervorrichtung in einer instabilen Position befindet, die folgenden Operationen umfasst:
    Ermitteln einer Position eines Schwerpunkts der mit Beinen versehenen Robotervorrichtung;
    Ermitteln einer Position von zwei oder mehreren Füßen der mit Beinen versehenen Robotervorrichtung, wobei die zwei oder mehreren Füße mit den zwei oder mehreren Beinen der mit Beinen versehenen Robotervorrichtung gekoppelt sind; und
    Ermitteln, ob die Position des Schwerpunkts der mit Beinen versehenen Robotervorrichtung außerhalb eines Polygons, das durch die ermittelte Position der zwei oder mehr Füße der mit Beinen versehenen Robotervorrichtung definiert ist, liegt.
  8. Verfahren nach Anspruch 1, wobei die Operation des Ermittelns, ob sich die mit Beinen versehene Robotervorrichtung in der stabilen Position befindet, die folgenden Operationen umfasst:
    Ermitteln einer Position eines Schwerpunkts der mit Beinen versehenen Robotervorrichtung;
    Ermitteln einer Position von zwei oder mehreren Füßen der mit Beinen versehenen Robotervorrichtung, wobei die zwei oder mehreren Füße mit den zwei oder mehreren Beinen der mit Beinen versehenen Robotervorrichtung gekoppelt sind; und
    Ermitteln, ob die Position des Schwerpunkts der mit Beinen versehenen Robotervorrichtung innerhalb eines Polygons, das durch die ermittelte Position der zwei oder mehr Füße der mit Beinen versehenen Robotervorrichtung definiert ist, liegt.
  9. Verfahren nach Anspruch 1, wobei die Bodenfläche der mit Beinen versehenen Robotervorrichtung so geformt ist, dass eine potenzielle Schwerkraftenergie der mit Beinen versehenen Robotervorrichtung basierend darauf, ob sich der Körper der mit Beinen versehenen Robotervorrichtung in der stabilen Position befindet, reduziert wird.
  10. Verfahren nach Anspruch 1, wobei die instabile Position die Position der mit Beinen versehenen Robotervorrichtung auf der ersten Seite der mit Beinen versehenen Robotervorrichtung in einer liegenden Position umfasst.
  11. Robotervorrichtung, beinhaltend:
    einen Körper (302);
    zwei oder mehr Beine (304A-D) die sich vom Körper erstrecken;
    zumindest einen Prozessor; und
    Datenspeicher, der eine durch den zumindest einen Prozessor ausführbare Programmlogik beinhaltet, um die Robotervorrichtung zu veranlassen, Funktionen auszuführen, die Folgendes umfassen:
    Ermitteln (202) einer Ausrichtung einer Bodenfläche einer Robotervorrichtung in Bezug auf eine Bodenfläche;
    basierend auf der ermittelten Ausrichtung das Ermitteln (204), dass sich die Robotervorrichtung in einer instabilen Position befindet, wobei die Robotervorrichtung nicht in der Lage ist, einen Stand in der instabilen Position beizubehalten;
    Ausführen (206) einer ersten Aktion, die so konfiguriert ist, dass die Robotervorrichtung in eine stabile Position zurückgebracht wird, sodass die Robotervorrichtung in der Lage ist, einen Stand in der stabilen Position beizubehalten, wobei die erste Aktion das Bewegen eines ersten Beins (304C, 304D) der Robotervorrichtung von einer ersten Position zu einer zweiten Position, derart beinhaltet, dass ein distales Ende des ersten Beins in der zweiten Position weiter von der Bodenfläche entfernt ist als in der ersten Position, und wobei ein proximales Ende des ersten Beins mit einer ersten Seite der Robotervorrichtung gekoppelt ist;
    wenn sich die Robotervorrichtung nach der ersten Aktion in der stabilen Position befindet, das Ausfahren (210) von zumindest zwei der zwei oder mehreren Beine der Robotervorrichtung; und
    wenn sich die Robotervorrichtung nach der ersten Aktion in der instabilen Position befindet, Ausführen (212) einer zweiten Aktion, die konfiguriert ist, um die Robotervorrichtung in die stabile Position zurückzubringen, wobei die zweite Aktion das Ausfahren des distalen Endes des ersten Beins der Robotervorrichtung weg vom Körper der Robotervorrichtung beinhaltet, sodass eine Schwerkraftenergie der Robotervorrichtung erhöht wird.
  12. Robotervorrichtung nach Anspruch 11, wobei die Funktionen ferner umfassen:
    wenn sich die Robotervorrichtung nach der zweiten Aktion in der stabilen Position befindet, das Ausfahren von zumindest zwei der zwei oder mehreren Beine der Robotervorrichtung; und
    wenn sich die Robotervorrichtung nach der zweiten Aktion in der instabilen Position befindet, Ausführen einer dritten Aktion, die konfiguriert ist, um die Robotervorrichtung in die stabile Position zurückzubringen.
  13. Robotervorrichtung nach Anspruch 12, wobei:
    die dritte Aktion das Ausfahren eines distalen Endes eines zweiten Beins der Robotervorrichtung vom Körper der Robotervorrichtung weg umfasst, und wobei ein proximales Ende des zweiten Beins mit einer zweiten Seite der Robotervorrichtung gekoppelt ist; oder die dritte Aktion das Bewegen des zweiten Beins von der Bodenfläche weg umfasst, um einen Drehimpuls für die mit Beinen versehene Robotervorrichtung bereitzustellen.
  14. Robotervorrichtung nach Anspruch 12, wobei die Funktionen ferner umfassen:
    wenn sich die Robotervorrichtung nach der dritten Aktion in der stabilen Position befindet, das Ausfahren von zumindest zwei der zwei oder mehreren Beine der Robotervorrichtung; und
    wenn sich die Robotervorrichtung nach der dritten Aktion in der instabilen Position befindet, Ausführen einer ersten Aktion, die konfiguriert ist, um die Robotervorrichtung in die stabile Position zurückzubringen.
  15. Computerlesbare Anweisungen (504), die bei Ausführung durch ein Computergerät das Computergerät veranlassen, das Verfahren nach einem der Ansprüche 1 bis 10 auszuführen.
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JP2018192617A (ja) 2018-12-06
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US9662791B1 (en) 2017-05-30
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EP3172015A4 (de) 2018-04-04

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